Attack planning: How to avoid doubles?

[Snoopy]

the brain was introduced with hc 5.0

see release notes here

https://hashcat.net/forum/thread-7903.html

also see the readme on Github (i think its quite similar to the release note)
https://github.com/hashcat/hashcat/blob/...t-brain.md

the brain works on client/server priciple, so you need one instance of hashcat providung the server side part (can be running on the same machine if needed)